Merge abseil_clients.gni into absl.gni.

No behavior change is expected, this CL only goal is to have one .gni
file in absl in order to maintain it more easily.

Bug: None
Change-Id: I2694a1689755395a855cca94c49152477e5017f2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2128077Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Mirko Bonadei <mbonadei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#754970}

third_party/abseil-cpp/abseil_clients.gni

-# Copyright 2019 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# Usage of Abseil in Chromium is guarded by an explicit opt-in list, before
-# adding projects to this list please reach out to cxx@chromium.org and CC:
-# - https://cs.chromium.org/chromium/src/third_party/abseil-cpp/OWNERS
-#
-# More information can be found at:
-# https://docs.google.com/document/d/1DgS1-A3rzboTLjpf4m1sqkJgWjnY_Ru2dokk1X1vBDU
-declare_args() {
-  # Additional targets that can depend on absl.
-  # ** DISCLAIMER **
-  #
-  # Using "additional_absl_clients" is highly discouraged because it will break
-  # the component build since Abseil doesn't have export annotations and WebRTC
-  # is already depending on it. Any CL that use "additional_absl_clients" will
-  # have a really high probability of being reverted.
-  additional_absl_clients = []
-}
-assert(!is_component_build || additional_absl_clients == [])
-
-_chromium_absl_clients = [
-  "//libassistant/*",
-  "//third_party/webrtc/*",
-  "//third_party/abseil-cpp/*",
-  "//third_party/googletest:gtest",
-]
-
-absl_visibility = _chromium_absl_clients + additional_absl_clients

third_party/abseil-cpp/absl.gni

@@ -8,7 +8,7 @@
 # to correctly compile abseil in Chromium.
 #
 # Targets that set visibility should set it to something more restrictive than
-# absl_visibility (defined in //third_party/abseil-cpp/abseil_clients.gni).
+# `absl_visibility` (defined below).
 #
 # Usage:
 # Most of the times its usage will be similar to the example below but all
@@ -21,7 +21,33 @@
 #  }
 
 import("//build_overrides/build.gni")
-import("//third_party/abseil-cpp/abseil_clients.gni")
+
+# Usage of Abseil in Chromium is guarded by an explicit opt-in list, before
+# adding projects to this list please reach out to cxx@chromium.org and CC:
+# - https://cs.chromium.org/chromium/src/third_party/abseil-cpp/OWNERS
+#
+# More information can be found at:
+# https://docs.google.com/document/d/1DgS1-A3rzboTLjpf4m1sqkJgWjnY_Ru2dokk1X1vBDU
+declare_args() {
+  # Additional targets that can depend on absl.
+  # ** DISCLAIMER **
+  #
+  # Using "additional_absl_clients" is highly discouraged because it will break
+  # the component build since Abseil doesn't have export annotations and WebRTC
+  # is already depending on it. Any CL that use "additional_absl_clients" will
+  # have a really high probability of being reverted.
+  additional_absl_clients = []
+}
+assert(!is_component_build || additional_absl_clients == [])
+
+_chromium_absl_clients = [
+  "//libassistant/*",
+  "//third_party/webrtc/*",
+  "//third_party/abseil-cpp/*",
+  "//third_party/googletest:gtest",
+]
+
+absl_visibility = _chromium_absl_clients + additional_absl_clients
 
 template("absl_source_set") {
   source_set(target_name) {

third_party/abseil-cpp/absl/hash/BUILD.gn

@@ -3,7 +3,6 @@
 # found in the LICENSE file.
 
 import("//build_overrides/build.gni")
-import("//third_party/abseil-cpp/abseil_clients.gni")
 import("//third_party/abseil-cpp/absl.gni")
 
 # Usage of Abseil in Chromium is guarded by an explicit opt-in list, before

third_party/abseil-cpp/absl/strings/BUILD.gn

@@ -3,7 +3,6 @@
 # found in the LICENSE file.
 
 import("//build_overrides/build.gni")
-import("//third_party/abseil-cpp/abseil_clients.gni")
 import("//third_party/abseil-cpp/absl.gni")
 
 # Usage of Abseil in Chromium is guarded by an explicit opt-in list, before

third_party/abseil-cpp/absl/types/BUILD.gn

@@ -3,7 +3,6 @@
 # found in the LICENSE file.
 
 import("//build_overrides/build.gni")
-import("//third_party/abseil-cpp/abseil_clients.gni")
 import("//third_party/abseil-cpp/absl.gni")
 
 # Usage of Abseil in Chromium is guarded by an explicit opt-in list, before